@mixin transition($transition){
    -webkit-transition: $transition;
    -moz-transition: $transition;
    -o-transition: $transition;
    -ms-transition: $transition;
    transition: $transition;
}
@mixin transform-origin($origin){
    -webkit-transform-origin: $origin;
    -moz-transform-origin: $origin;
    -ms-transform-origin: $origin;
    -o-transform-origin: $origin;
    transform-origin: $origin;
}
@mixin scale($scale){
    -webkit-transform: scale($scale);
    -moz-transform: scale($scale);
    -ms-transform: scale($scale);
    -o-transform: scale($scale);
    transform: scale($scale);
}
@mixin opacity($opacity){
    opacity: $opacity;
    filter: alpha(opacity=$opacity * 100);
}